When Antonius summoned the senate to the Capitol on November 28, in order to have Caesar's nephew, Octavianus, declared an enemy of the state, Carfulenus and his colleagues, Tiberius Canutius and Lucius Cassius Longinus, were excluded from the Capitol, so that they could not interpose their veto against the senate's decree.
Another leading conspirator, Lucius Cassius Longinus who was praetor in 66 BC with Cicero, joined the conspiracy after he failed to obtain the consulship in 64 BC along with Catiline.
When the latter summoned the senate to the Capitol on the 28th of November, in order to declare Octavianus an enemy of the state, he would not allow Canutius and two of his fellow tribunes, Decimus Carfulenus and Lucius Cassius Longinus, to approach the Capitol, lest they should put their veto upon the decree of the senate.
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